The German 6. SS-Panzerarmee (6th SS-Armoured Army) has to follow a route through a part of the Ardennes which the tanks were unable to pass. The 12. and 1. Panzer SS (12th and 1st SS Armoured Divisions) should force the breakthrough. After that the 2. and 9. Panzer SS had to push on to Antwerp. The Americans were surprised at first by this offensive but they recovered their defense lines and held up the German armoured divisions. In the end the breakthrough of the 6. SS-Panzerarmee failed.